- #1
Paulanddiw
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Blue-shifted Galaxies
Why are the blue-shifted galaxies located pretty much in two directions in the sky about 180º apart? I got a list of blue-shifted galaxies from the NASA/IPAC EXTRAGALACTIC DATABASE (NED), http://nedwww.ipac.caltech.edu/index.html, and sorted them by their velocities. The faster they are approaching, the fewer there are in the regions about RA 100º and RA 300º.
Is this NEC data base incomplete and there are blue-shifted galaxies in these regions waiting to be observed?
Or is space in the directions with few blue-shifted galaxies expanding faster than that with lots of blue-shifted galaxies? This added expansion velocity would subtract from the approach velocity so they would not be very blue (or even be red-shifted) for moderate approach speeds.
I understand blue-shifted galaxies are orbiting something else. Right now they are approaching, sometime in the past (or future) they were (will be) receding. Otherwise, if they'd been approaching us for the last 13 billion years, most of them would have already past us by, and become red-shifted galaxies.
That NED data base is pretty big and it takes a while to sort out the blue-shifted entries. If you want to see my spread sheet and charts, send me an e-mail and I'll e-mail you the file. It's a lot smaller than the NED because I kept only those approaching at 100 kps or more.
Paul Deichelbohrer
paulanddiw@netscape.com
Why are the blue-shifted galaxies located pretty much in two directions in the sky about 180º apart? I got a list of blue-shifted galaxies from the NASA/IPAC EXTRAGALACTIC DATABASE (NED), http://nedwww.ipac.caltech.edu/index.html, and sorted them by their velocities. The faster they are approaching, the fewer there are in the regions about RA 100º and RA 300º.
Is this NEC data base incomplete and there are blue-shifted galaxies in these regions waiting to be observed?
Or is space in the directions with few blue-shifted galaxies expanding faster than that with lots of blue-shifted galaxies? This added expansion velocity would subtract from the approach velocity so they would not be very blue (or even be red-shifted) for moderate approach speeds.
I understand blue-shifted galaxies are orbiting something else. Right now they are approaching, sometime in the past (or future) they were (will be) receding. Otherwise, if they'd been approaching us for the last 13 billion years, most of them would have already past us by, and become red-shifted galaxies.
That NED data base is pretty big and it takes a while to sort out the blue-shifted entries. If you want to see my spread sheet and charts, send me an e-mail and I'll e-mail you the file. It's a lot smaller than the NED because I kept only those approaching at 100 kps or more.
Paul Deichelbohrer
paulanddiw@netscape.com